Global crescent moon visibility predictions by Islamic month
HilalGuide Crescent Moon Visibility Map
Very Likely
≥75% confidence
Likely
55–74% confidence
Difficult
25–54% confidence
Unlikely
<25% confidence
These global visibility maps show where the crescent moon (Hilal) is predicted to be visible on each observation day following a new moon conjunction. The maps are generated using NASA JPL ephemeris data combined with a machine learning model trained on over 2,000 historical crescent sighting observations worldwide.
Each Islamic month begins when the Hilal is first sighted after the new moon. Because visibility depends on geographic location, the crescent may be visible in some regions but not others on the same evening. These maps help communities worldwide anticipate when the new month is likely to begin in their area.
Warm colors (gold, amber) indicate regions where the crescent is most likely to be visible. Cool colors (blue, dark gray) indicate regions where visibility is difficult or unlikely. The visibility frontier typically moves from west to east.